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Given that the two curves a r g(z)=pi/6 ...

Given that the two curves `a r g(z)=pi/6 and |z-2sqrt(3)i|=r` intersect in two distinct points, then a. `[r]!=2` b. `0 < r < 3` c. `r=6` d. `3 < r < 2sqrt(3)` (Note : [r] represents integral part of r)

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